- if you do that, it may require one of those dual band jobbies? I could not get my Samsung TV to work on a regular cheapo dongle and they wanted forty quid for their posh unit. Eventually, I found who supplied Samsung and bought one via a third party supplier on eBay for about £18. A couple of mobiles play the same silly tricks, as well as Apple. The HW inside one of these sticks barely differs, so I guess they've etched a couple of extra tracks in the silicon to deal with the two frequencies? Either way the cost of design, manufacture & marketing can't differ more than a few pennies.

...that one seems to indicate inadequate high-frequency filtering on the 5V line into the Pi, which indicates a design shortcoming.

There are so many problems reported with the power supply being inadequate, all stemming from the decision to go for a micro-USB socket.
I have a bit of a "bee in my bonnet" about that. I think that they should have gone for a normal power plug and socket, and sold power supplies to match.

...which is what the Odroid people have done.

I also had a power problem with my Pi3, initially. I am using my new Mbeat Gorilla power charger, with 2.3A rated output on each USB socket. However, I still got the little rainbow rectangle sometimes, so I changed the cable, that fixed it.
So it would seem that voltage supply is not a problem anymore._________________http://bkhome.org/news/

These Rpi units certainly are flimsy although I've not experienced the issues BK reports - yet. I think the intention is that one purchases their custom cases to anchor them to some extent. Mine are screwed to bits of old (melamine-coated) kitchen cabinet. This helps stabilise the connectors as one can slide plugs into them with less force and more precision. I have experienced other HDMI and PSU issues, however. Not all TVs and, especially monitors, accept their output signals: ditto functionality of some PSUs and, worse, the Zero is fussy about USB hubs (all powered, of course, for the Zero). Fortunately, have boxloads to select from. One of the surprises I had was that an el cheapo HDMI-to-VGA, with sound pick-off was a great success with the B+ enabling use of old monitors for just over a fiver.
Reiterating previous comments, although I find it useful to be able run the oldest Puppy on these ARMv6/11 units, I see their greatest attraction in deploying their GPIO to operate relays, turn things ON/OFF, sensor inputs, etc. This is the intention of all educationalists in UK schools. Whether it will succeed depends on many factors, not least inspirational teaching, but many of the clever coders visiting fora like this could have a powerful contribution to make. Certainly, the latest ARMv7 Pi2 & 3 are not necessary for these purposes and Eban still regards the v6 architecture as current - hence the Zero

This does seem to indicate a fault in the Pi, a hairline crack for example, where the HDMI socket is soldered in.

HDMI cables can vary quite a lot in quality, but since the signals being passed are digital, they usually either work or they don't. That also makes it hard to troubleshoot borderline cases, where you get a good image on the display but the signal strength is just barely over the threshold to deliver that image.

There isn't much surface area for contact on the many, tiny pins of an HDMI connector, and it wouldn't take much to get a bad connection at any one (or more pins). That's one place quality can come into the picture (or simply dirty contacts – note that HDMI cables usually come with a plastic cap covering the ends).

If you jiggle the HDMI connector at the end of the cable connected to either your Pi2 or Pi3 and the signal flickers, the problem causing the flicker is unlikely to be on both of your Pis. The HDMI cable would be much more likely the common denominator. The best way to find out is to try a different cable. I have a number of HDMI cables and I can vouch for the fact that they are not created equal _________________Puppy unofficial tester (off and on) since v0.9.2

I suspect that there was a strange permissions problem. I have found that
clicking on files in a windows server location don't open and that the open
dialog in applications doesn't show the windows server location, yet rox
file manager shows the location and let's me drag files from it.

Hi Barry, I was on Facebook on the RetroPie Group and this guy posted a Commodore 64 that he gutted and purchased a C-64 usb adapter, basically turning a C-64 keyboard into a regular USB keyboard, then he tossed in Raspberry Pi and ran linux on it. A few years back in Sydney I purchased a C-64 for like $20 on ebay. That could of been a good candidate, But really I don't think I could destroy a working C-64 for any reason. Anyways here's a link to the Keyboard adapter, it isn't cheap but I guess it does the job really good if you like retro things. http://www.vesalia.de/
ttuuxxx_________________http://audio.online-convert.com/ <-- excellent site
http://samples.mplayerhq.hu/A-codecs/ <-- Codec Test Files
http://html5games.com/ <-- excellent HTML5 games

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